Jrelecs Apm2.6 Ardupilot Mega APM 2.6 Flight Control Board Exterbal Compass w/ Protective Case for Multicopter Airplane - Black Flight controller board, control multicopter or fixed-wing flight. Arduino Compatible With one top pin connectors and two side-pin connectors Onboard 4 MegaByte Dataflash chip for automatic Includes 3-axis gyro, accelerometer and magnetometer, along with a high-performance barometer